Elevation Contours of the Bedrock Surface, North Platte 1- by 2- degree Quadrangle,
Nebraska, Digitized From a Published 1:250,000- Scale Geologic Map
By Ronald B. Zelt
ABSTRACT:
A geologic map showing the configuration of the bedrock surface for the
North Platte, Nebraska, 1- by 2-degree quadrangle was published at a scale of
1:250,000 in 1991. This report describes the conversion of the
bedrock-surface elevation map into a digital geographic data set and includes
those data at a nominal scale of 1:500,000. A film separation of the
published elevation contours was scanned to produce a file of digital graphics
data. The digital graphics data were processed further to produce a digital
geographic data set. Geographic feature attributes and data-set documentation
also are included in the digital data set. The digital geographic data are
formatted for distribution in accordance with the Spatial Data Transfer
Standard approved by the U.S. National Institute of Standards and Technology.
DESCRIPTORS: Geology, Nebraska
CITATION:
Zelt, R.B., 1995, Elevation contours of the bedrock surface, North Platte 1- by 2-degree
quadrangle, Nebraska, digitized from a published 1:250,000-scale geologic map: U.S. Geological
Survey Open-File Report 95-330, diskette.
For additional information Copies of the report can be
write to: purchased from:
District Chief U.S. Geological Survey
U.S. Geological Survey, WRD Earth Science Information Center
406 Federal Building Open-File Reports Section
100 Centennial Mall, North Box 25286, MS 517
Lincoln, Nebraska 68508 Denver Federal Center
Denver, CO 80225